# C1257 — Distinguish the two four-state source fields

## Question

Why do valid source summaries give widths190 and275?

## Inputs

```json
{}
```

## Sources

```json
[
  "C1256",
  "File18 §1.1",
  "Strategy §4.1"
]
```

## Opened utc

2026-09-28T05:46:39.714230+00:00

## Results

```json
{
  "restrictions": {
    "path": "model/regular_kernel_four_state_restrictions.json",
    "sha256": "746905c28121909a96402a212fbe1f45d719f8df0828a4e87cf1aa1b0680d4e5",
    "bytes": 298
  },
  "fields": [
    [
      0,
      60,
      130,
      190
    ],
    [
      0,
      60,
      215,
      275
    ]
  ]
}
```

## Finding

The190 field variesTerah andCainan; the275 field variesTerah andSojourn withCainanOFF. Their differentwidths arise from differentsourcechoices, andboth sit within the405 field.

## Reassessment

Compare the generatedeight offsets with theliteral source’sYear6 andendpoint columns.

## Checks

```json
{
  "TC": true,
  "TS": true,
  "widths": true
}
```

## Closed utc

2026-09-28T05:46:39.714674+00:00

## Record provenance

Exact record hash: `8d35865d82c52c5d58e6d563c2c0dbd8318591d1f4ffada4d127c9f944a14411`

Source journal: `Research_Cycles/C1132_C1431_Recovered/journal.json`